<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>计算器</title>
</head>
<body>
<form action="Calcu/sum" method="post">
    <h1>计算器</h1>
    数字1: <input name="num1" type="text"> <br>
    数字2: <input name="num2" type="text"> <br>
    <input type="submit" value="点击相加">
</form>

</body>
</html>